CALCULATE → REFERENCE → SELECT → RECALCULATE → VERIFY → SAVE
Belt Drive Sizing & Standard Belt Selection
Use effective datum/pitch pulley diameters, calculate the original open-belt geometry, explicitly choose a known belt profile and verify the center distance for the selected actual Ld belt.
What you need: driver datum/pitch diameter, driven datum/pitch diameter, original center distance, driver rpm.
What you get: a calculated requirement, compatible sourced options, the consequences of your actual component selection and a preliminary Job Card.
Profile is chosen explicitly; length alone does not identify section. Verify required power, speed, service factor, number of belts, tension, clearance and installation travel.
ENTER ONCE
Project inputs
Defaults are editable planning examples. Confirm your actual values; changing units preserves the physical quantity.
Calculated locally. Shared values feed downstream steps automatically. Inputs enter browser storage only when you choose Save Job.
Calculate requirement
CompletedDatum geometry and ideal no-slip speed calculated. Belt section is not inferred.
- Calculated datum belt length
- 1,476.239 mm
- Ideal driven RPM
- 725 rpm
- Ideal speed ratio
- 2 :1
Calculation method
Original Belt Length, Pulley Ratio and Pulley RPM expression definitions. Open-belt approximation; datum/pitch dimensions.
Look up a real family
Not startedChoose the actual known family; a calculated size does not identify its material/profile.
Select component
Not startedComplete the required upstream step; no previous result is retained.
Recalculate & verify
Not startedComplete the required upstream step; no previous result is retained.
ENGINEERING SUMMARY
Complete the valid calculation steps
No verified component selected yet.
Profile is chosen explicitly; length alone does not identify section. Verify required power, speed, service factor, number of belts, tension, clearance and installation travel.
This is preliminary geometry and kinematics, not a complete belt-drive design or manufacturer capacity approval.
Existing tools and reference context
These Jobs reuse validated ValiCalc models. Use the standalone tools for a separate calculation; the Job carries shared values automatically within this page.
Assumptions and verification limits
Original open-belt length approximation; datum/pitch diameters, negligible slip.
Catalog comparison is Ld only. Li and La are not interchangeable. Center distance is mechanically adjustable.
Profile is chosen explicitly; length alone does not identify section. Verify required power, speed, service factor, number of belts, tension, clearance and installation travel.
This is preliminary geometry and kinematics, not a complete belt-drive design or manufacturer capacity approval.
Saved Jobs live only in your browser. Reopening recalculates from inputs; clearing browser data deletes them. No private engineering input is added to the public URL. Copy/share explicitly includes the displayed Job Card.